mirror of
https://gitlab.isc.org/isc-projects/bind9
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kill persistent errors. Always retry the I/O now.
This commit is contained in:
Michael Graff
parent
d2439ad5af
commit
1deaf52c98
@ -15,7 +15,7 @@
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: socket.h,v 1.49 2000/08/01 01:30:47 tale Exp $ */
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/* $Id: socket.h,v 1.50 2000/09/07 01:59:56 explorer Exp $ */
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#ifndef ISC_SOCKET_H
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#define ISC_SOCKET_H 1
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@ -115,9 +115,6 @@ struct isc_socket_connev {
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/*
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* _ATTACHED: Internal use only.
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* _FATALERROR: The socket result code is "sticky" -- that is, any
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* further i/o activity of the same type (read or write)
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* will return the same code; retrying is pointless.
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* _TRUNC: Packet was truncated on receive.
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* _CTRUNC: Packet control information was truncated. This can
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* indicate that the packet is not complete, even though
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@ -127,7 +124,6 @@ struct isc_socket_connev {
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* _MULTICAST: The UDP packet was received via a multicast transmission.
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*/
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#define ISC_SOCKEVENTATTR_ATTACHED 0x80000000U /* internal */
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#define ISC_SOCKEVENTATTR_FATALERROR 0x40000000U /* sock is dead */
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#define ISC_SOCKEVENTATTR_TRUNC 0x00800000U /* public */
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#define ISC_SOCKEVENTATTR_CTRUNC 0x00400000U /* public */
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#define ISC_SOCKEVENTATTR_TIMESTAMP 0x00200000U /* public */
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@ -15,7 +15,7 @@
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: socket.c,v 1.164 2000/09/06 22:55:33 explorer Exp $ */
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/* $Id: socket.c,v 1.165 2000/09/07 01:59:57 explorer Exp $ */
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#include <config.h>
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@ -141,8 +141,6 @@ struct isc_socket {
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unsigned int references;
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int fd;
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int pf;
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isc_result_t recv_result;
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isc_result_t send_result;
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ISC_LIST(isc_socketevent_t) send_list;
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ISC_LIST(isc_socketevent_t) recv_list;
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@ -834,8 +832,6 @@ doio_recv(isc_socket_t *sock, isc_socketevent_t *dev) {
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#define SOFT_OR_HARD(_system, _isc) \
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if (errno == _system) { \
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if (sock->connected) { \
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if (sock->type == isc_sockettype_tcp) \
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sock->recv_result = _isc; \
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send_recvdone_event(sock, &dev, _isc); \
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return (DOIO_HARD); \
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} \
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@ -843,7 +839,6 @@ doio_recv(isc_socket_t *sock, isc_socketevent_t *dev) {
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}
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#define ALWAYS_HARD(_system, _isc) \
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if (errno == _system) { \
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sock->recv_result = _isc; \
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send_recvdone_event(sock, &dev, _isc); \
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return (DOIO_HARD); \
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}
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@ -856,7 +851,6 @@ doio_recv(isc_socket_t *sock, isc_socketevent_t *dev) {
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#undef SOFT_OR_HARD
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#undef ALWAYS_HARD
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sock->recv_result = ISC_R_UNEXPECTED;
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send_recvdone_event(sock, &dev, ISC_R_UNEXPECTED);
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return (DOIO_SUCCESS);
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}
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@ -866,10 +860,8 @@ doio_recv(isc_socket_t *sock, isc_socketevent_t *dev) {
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* UDP, zero length reads are perfectly valid, although
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* strange.
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*/
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if ((sock->type == isc_sockettype_tcp) && (cc == 0)) {
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sock->recv_result = ISC_R_EOF;
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if ((sock->type == isc_sockettype_tcp) && (cc == 0))
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return (DOIO_EOF);
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}
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if (sock->type == isc_sockettype_udp)
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dev->address.length = msghdr.msg_namelen;
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@ -967,8 +959,6 @@ doio_send(isc_socket_t *sock, isc_socketevent_t *dev) {
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#define SOFT_OR_HARD(_system, _isc) \
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if (errno == _system) { \
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if (sock->connected) { \
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if (sock->type == isc_sockettype_tcp) \
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sock->send_result = _isc; \
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send_senddone_event(sock, &dev, _isc); \
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return (DOIO_HARD); \
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} \
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@ -976,18 +966,19 @@ doio_send(isc_socket_t *sock, isc_socketevent_t *dev) {
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}
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#define ALWAYS_HARD(_system, _isc) \
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if (errno == _system) { \
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if (sock->connected && sock->type == isc_sockettype_tcp) \
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sock->send_result = _isc; \
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send_senddone_event(sock, &dev, _isc); \
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return (DOIO_HARD); \
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}
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SOFT_OR_HARD(ECONNREFUSED, ISC_R_CONNREFUSED);
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SOFT_OR_HARD(EACCES, ISC_R_NOPERM);
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SOFT_OR_HARD(EAFNOSUPPORT, ISC_R_ADDRNOTAVAIL);
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ALWAYS_HARD(ENETUNREACH, ISC_R_NETUNREACH);
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ALWAYS_HARD(EHOSTUNREACH, ISC_R_HOSTUNREACH);
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ALWAYS_HARD(ENOBUFS, ISC_R_NORESOURCES);
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ALWAYS_HARD(EADDRNOTAVAIL, ISC_R_ADDRNOTAVAIL);
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ALWAYS_HARD(EPERM, ISC_R_HOSTUNREACH);
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ALWAYS_HARD(EPIPE, ISC_R_NOTCONNECTED);
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#undef SOFT_OR_HARD
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#undef ALWAYS_HARD
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@ -1005,8 +996,6 @@ doio_send(isc_socket_t *sock, isc_socketevent_t *dev) {
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UNEXPECTED_ERROR(__FILE__, __LINE__,
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"internal_send: %s: %s",
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addrbuf, strerror(errno));
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if (sock->connected && sock->type == isc_sockettype_tcp)
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sock->send_result = ISC_R_UNEXPECTED;
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send_senddone_event(sock, &dev, ISC_R_UNEXPECTED);
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return (DOIO_HARD);
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}
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@ -1126,9 +1115,6 @@ allocate_socket(isc_socketmgr_t *manager, isc_sockettype_t type,
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sock->connecting = 0;
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sock->bound = 0;
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sock->recv_result = ISC_R_SUCCESS;
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sock->send_result = ISC_R_SUCCESS;
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/*
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* initialize the lock
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*/
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@ -1514,9 +1500,6 @@ send_recvdone_event(isc_socket_t *sock, isc_socketevent_t **dev,
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if (ISC_LINK_LINKED(*dev, ev_link))
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ISC_LIST_DEQUEUE(sock->recv_list, *dev, ev_link);
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if (sock->recv_result != ISC_R_SUCCESS)
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(*dev)->attributes |= ISC_SOCKEVENTATTR_FATALERROR;
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if (((*dev)->attributes & ISC_SOCKEVENTATTR_ATTACHED)
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== ISC_SOCKEVENTATTR_ATTACHED)
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isc_task_sendanddetach(&task, (isc_event_t **)dev);
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@ -1544,9 +1527,6 @@ send_senddone_event(isc_socket_t *sock, isc_socketevent_t **dev,
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if (ISC_LINK_LINKED(*dev, ev_link))
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ISC_LIST_DEQUEUE(sock->send_list, *dev, ev_link);
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if (sock->send_result != ISC_R_SUCCESS)
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(*dev)->attributes |= ISC_SOCKEVENTATTR_FATALERROR;
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if (((*dev)->attributes & ISC_SOCKEVENTATTR_ATTACHED)
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== ISC_SOCKEVENTATTR_ATTACHED)
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isc_task_sendanddetach(&task, (isc_event_t **)dev);
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@ -1742,14 +1722,7 @@ internal_recv(isc_task_t *me, isc_event_t *ev) {
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* continue the loop.
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*/
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if (dev->ev_type == ISC_SOCKEVENT_RECVMARK) {
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send_recvdone_event(sock, &dev, sock->recv_result);
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goto next;
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}
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if (sock->recv_result != ISC_R_SUCCESS) {
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socket_log(sock, NULL, IOEVENT,
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"STICKY RESULT: %d", sock->recv_result);
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send_recvdone_event(sock, &dev, sock->recv_result);
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send_recvdone_event(sock, &dev, ISC_R_SUCCESS);
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goto next;
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}
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@ -1828,12 +1801,7 @@ internal_send(isc_task_t *me, isc_event_t *ev) {
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* continue the loop.
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*/
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if (dev->ev_type == ISC_SOCKEVENT_SENDMARK) {
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send_senddone_event(sock, &dev, sock->send_result);
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goto next;
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}
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if (sock->send_result != ISC_R_SUCCESS) {
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send_senddone_event(sock, &dev, sock->send_result);
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send_senddone_event(sock, &dev, ISC_R_SUCCESS);
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goto next;
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}
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@ -2274,12 +2242,6 @@ isc_socket_recvv(isc_socket_t *sock, isc_bufferlist_t *buflist,
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if (!was_empty)
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goto queue;
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if (sock->recv_result != ISC_R_SUCCESS) {
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send_recvdone_event(sock, &dev, sock->recv_result);
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UNLOCK(&sock->lock);
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return (ISC_R_SUCCESS);
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}
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switch (doio_recv(sock, dev)) {
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case DOIO_SOFT:
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goto queue;
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@ -2373,12 +2335,6 @@ isc_socket_recv(isc_socket_t *sock, isc_region_t *region, unsigned int minimum,
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if (!was_empty)
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goto queue;
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if (sock->recv_result != ISC_R_SUCCESS) {
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send_recvdone_event(sock, &dev, sock->recv_result);
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UNLOCK(&sock->lock);
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return (ISC_R_SUCCESS);
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}
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switch (doio_recv(sock, dev)) {
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case DOIO_SOFT:
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goto queue;
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@ -2483,12 +2439,6 @@ isc_socket_sendto(isc_socket_t *sock, isc_region_t *region,
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if (!was_empty)
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goto queue;
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if (sock->send_result != ISC_R_SUCCESS) {
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send_senddone_event(sock, &dev, sock->send_result);
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UNLOCK(&sock->lock);
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return (ISC_R_SUCCESS);
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}
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switch (doio_send(sock, dev)) {
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case DOIO_SOFT:
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goto queue;
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@ -2593,12 +2543,6 @@ isc_socket_sendtov(isc_socket_t *sock, isc_bufferlist_t *buflist,
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if (!was_empty)
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goto queue;
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if (sock->send_result != ISC_R_SUCCESS) {
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send_senddone_event(sock, &dev, sock->send_result);
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UNLOCK(&sock->lock);
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return (ISC_R_SUCCESS);
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}
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switch (doio_send(sock, dev)) {
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case DOIO_SOFT:
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goto queue;
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@ -3205,16 +3149,6 @@ isc_socket_recvmark(isc_socket_t *sock,
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dev->result = ISC_R_SUCCESS;
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dev->minimum = 0;
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/*
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* If the queue is empty, simply return the last error we got on
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* this socket as the result code, and send off the done event.
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*/
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if (ISC_LIST_EMPTY(sock->recv_list)) {
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send_recvdone_event(sock, &dev, sock->recv_result);
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UNLOCK(&sock->lock);
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return (ISC_R_SUCCESS);
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}
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/*
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* Bad luck. The queue wasn't empty. Insert this in the proper
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* place.
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@ -3260,16 +3194,6 @@ isc_socket_sendmark(isc_socket_t *sock,
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dev->result = ISC_R_SUCCESS;
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dev->minimum = 0;
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/*
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* If the queue is empty, simply return the last error we got on
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* this socket as the result code, and send off the done event.
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*/
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if (ISC_LIST_EMPTY(sock->send_list)) {
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send_senddone_event(sock, &dev, sock->send_result);
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UNLOCK(&sock->lock);
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return (ISC_R_SUCCESS);
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}
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/*
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* Bad luck. The queue wasn't empty. Insert this in the proper
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* place.
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